Dental instrument



(No Model.)

J. R. 8: J. W. KELLY & S. A. STIENBARGER.

DENTAL INSTRUMENT.

No. 367,108. Patented July 26, 1887'.

Z(/ 'iiwsses:

N. PETERS, PholwLillw n her, washin um, 0v 0.

JOSIAH R. KELLY, JOHN W. KELLY,

PATENT OFFICE.

AND SHELDON A. S'IIENBARGER, or

AUGUSTA, ILLINOIS DENTAL INSTRUMENT.

SPECIFICATION forming part of Letters Patent No. 367,108, dated July 26, 1887.

Application filed Ocfobcr P, 1886. Serial No. 215,753. (No model.) 7

lo dental appliances for extracting teeth without pain; and the object of our invention is to provide a simple means for extracting teeth without exposing the person to the influence of ether or other gases. \Ve attain this ohject by the mechanism illustrated in the accompanying drawings, in which Figure l is a side elevation of the entire instrument; Fig. 2, a longitudinal section of a part of the instrument on the line x 00. 2o Similarletters refer to similar parts th roughout the several views.

Our invention consists in arranging one or more automatic hypodermic syringes in the ends or jaws of pliers, so as to make it easy to thoroughly inject the gums with cocaine or other anaesthetic, and thus preventall pain in the extraction of teeth. The levers H H are like pliersin their general outlines, thejaw parts of which, 00, are provided with hollow rubber bulbsi i, to which are connected the disks n a, into which are inserted the hypodermic needles ff. The said syringes thus provided are held in the hollows I l in the jaws O O by the compressorsprings s .9, said compressor-springs s 8 being provided with perforations at their outer ends to allow the needlesff to pass through them. To the inner sides of the said springs s s the rubber dams D Dare secured, said dams D D being also perforated to admit the needles f f, and also provided with cavities e e, for holding a small quantity of the drug in contact with the gums to deaden the pain which would otherwise be caused by the needles passing through 1,5 the membrane. Said springs s s are also provided with two lighter springs, m m, the said springs m at being also perforated for the admission of the needles f f, the office of said springs in m being to keep the points of ff from piercing the gums while pressure enough is applied upon the bulbs i i to fill the cavities e e, for the purpose above described.

To operate the instrument, one of the springs s s is compressed with a finger,while the point off is kept immersed in the drug to be injected. The pressure being released, the bulb expands'and fills itself with the drug, and the jaws O O are then inserted into the patients mouth, so as to clasp the gum near the tooth to be extracted. By gently closing the levers H H the dams D D are made to conform to the gums, so as to hold a portion of the drug in contact with the membrane, for the purpose hereinbefore described. Increased pressure upon the levers H H causes a part of the 6 contents of the bulbs it to be injected into the gums by the springs m m yielding and allowing the necdlesff to penetrate the membrane. The jaws O O are provided with longitudinal slots aa,which allow the springs 88 to be compressed through the greater part 0tv their length, said springs s 5 being held in place by rivets b b.

'IVe are aware that prior to our invention pliers with absorbing pads attached to their jaws have been used to apply anaesthetics to the gums, and also of the use of ordinary hypodermicsyringesiu injecting anaesthetics into the gums.

What we claim as our invention, and wish to secure by Letters Patent, is

1. The co1nbinalion,with the jaws of pliers, of one or more automatic hypodermic syringes, substantially as described, and for the purpose specified.

2. In a dental instrument, the levers H H, hingej, jaws O O, springs s s, secured to said jaws, dams D D, secured to said springs, rubber bulbs it, carrying disks n a, into which are secured hypodermic needlesff, supported 0 by secondary springs m m, secured to aforesaid springs s s, all combined substantially as described, and for the purpose specified.

JOSIAH R. KELLY. JOHN W. KELLY. V SHELDON A. STIENBARGER.

W'i tnes'ses:

AMY BUReEss, ANNA STIENBARGER. 

